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Leaded Glass Viewports

LGS Series / X-Ray Viewport Shields

AGP offers 'Leaded Glass Viewport Shields' in five (5) standard sizes that mount, or 'piggyback' onto CF flanges from 1.33 to 8 inch diameters.

The Lead Glass Viewport Shield is a safety accessory used to block harmful X-Ray radiation while allowing a safe and clear view into the vacuum system. The shield is mounted on the atmosphere side of a standard CF type Zero-Length viewport using longer than standard bolts (long fasteners not included).

Please note that the 'Leaded Glass Viewport Shield' glass thickness may vary as needed to attain the specified 2mm lead shielding equivalence. Furthermore, customers are responsible for determining the appropriate, safe level of X-ray radiation shielding required for their specific applications. 

Features

  • LGS Series X-Ray Radiation Shields with removable leaded glass substrates
  • 2mm Lead Equivalence 1
  • High temperature rated to 200°C
  • Air-Side Mounting / Installation
  • Conflat® compatible mounts
  • Stainless steel construction
  • Custom Solutions on Request

     

Specifications

Material 
Flange304
Holder Clips 2, Substrate304
Glass Substrate, DemountablePb Glass
Seal, VacuumNone
Vacuum Range 3 
UHV, Ultrahigh Vacuum1x10E-10 Torr
HV, High vacuum1x10E-8 Torr
Temperature Range 4 
Leaded Glass 5200°C
Glass-to-Metal Seal, Viewport350°C
Flange Mount, Conflat® CF450°C
Flange Mount, ISO NW150°C
Thermal Gradient, Max/minute10°C
Transmission Range 6 
@550nm, Leaded Glass85%
Notes 
  1. Leaded glass thickness is nominal and will vary as needed to attain a 2mm lead shielding equivalence
  2. 1.33 CF Shield is fitted with PEEK (polyether ether ketone) clips
  3. Leak tested to 5x10-10 Standard cc/sec of He.
  4. Overall assembly ratings must be adjusted to that of the lowest rated component. For cryogenic service, the lowest recommended temperature is -80°C
  5. Leaded glass is not tempered or fire rated.
  6. Transmission curves are provided for reference only. Transmission for individual viewports may vary based on glass substrate thicknesses, surface finish and/or other conditions.
  7. To prevent tarnishing, wipe fingerprints and grease off immediately. Use a soft dry cloth to clean leaded glass surfaces; never use a wet rag. If dry cloth doesn't remove smudges, use clean alcohol.
  8. Hairline scratches are inherent in the leaded glass manufacturing process.